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Arihangdu

  • one year ago

How to calculate oxidation number of chlorine in Al(ClO4)3

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  1. Zale101
    • one year ago
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    What is the overall charge of perchlorate?

  2. Arihangdu
    • one year ago
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    I don't know?

  3. Zale101
    • one year ago
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    the overall charge of perchlorate is -1

  4. Zale101
    • one year ago
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    what about oxygen, what is the charge of it?

  5. Arihangdu
    • one year ago
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    -2

  6. Zale101
    • one year ago
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    Correct. How many oxygen atoms are there?

  7. Arihangdu
    • one year ago
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    12

  8. Arihangdu
    • one year ago
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    4 x 3=12 right

  9. Arihangdu
    • one year ago
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    - 2 right or 7

  10. Arihangdu
    • one year ago
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    3

  11. Arihangdu
    • one year ago
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    Questions is what is the oxidation number of in Al(ClO4)3 ?

  12. Zale101
    • one year ago
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    Correct. So Oxygen has 12 atoms and -2 charge Chlorine has 3 atoms. Al has a charge of +3 and it has only one atom The overall charge of a compound has to equal to zero. That means, the information that we know can be applied as \(+3+3\color{red}{x}+(-2)(12)=0\) The x in red means that we don't know the charge of chlorine but we know it has 3 atoms.

  13. Zale101
    • one year ago
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    |dw:1443243965223:dw|

  14. Arihangdu
    • one year ago
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    Value of x is chlorine fight?

  15. Zale101
    • one year ago
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    The value of x is the chlorine's oxidation number.

  16. Arihangdu
    • one year ago
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    3 X =_21, x= -7?

  17. Zale101
    • one year ago
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    |dw:1443278631181:dw|

  18. whpalmer4
    • one year ago
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    A shortcut would be to note that if we have \(\text{Al}^{3+}\) and 3 perchlorate ions, each one of the perchlorate ions must have a net charge of \(-1\). Knowing that the oxygen atoms each have a charge of \(-2\), \[-1 = Cl + 4 * O\]\[-1 = Cl + 4*(-2)\]\[-1 = Cl -8\]\[7 = Cl\] so our chlorine oxidation number is +7.

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